STURGIS, S.D. - The South Dakota Highway Patrol reported five injury crashes in its latest report Saturday, three of them involving serious injuries.

The latest numbers bring to 64, the total number of injury crashes reported at this year's Rally. That is ahead of last year's 46. There have been 49 non-injury crashes -- also ahead of last year's 40.

The number of D-U-I and drug arrests also remain down over last year, as do the number of citations and warnings. D-U-I arrests were 150 as of today, and drug arrests were 191. That includes both felony and misdemeanor drug arrests.

Here is a synopsis of Friday's crashes:

At 7:31 a.m., Interstate 90, mile marker 52, Black Hawk: A vehicle westbound on Interstate 90 rear-ended a semi truck. The female driver of the vehicle, 21, was wearing a seatbelt and received minor injuries. The female passenger, 21, suffered serious non-life threatening injuries. Both are from Rapid City. There were no injuries to either the male semi-truck driver, 56, from Los Angeles, or the male passenger, 21, from Monroe LA. Both were wearing seatbelts.

At 12:58 p.m., Wildlife Loop, mile marker 17, 15 miles east of Custer: Two motorcycles were southbound on Wildlife Loop when the lead motorcycle slowed down and was rear-ended by the second. The male driver of the first motorcycle, 56, was not injured. He was not wearing a helmet. The driver and passenger of the second motorcycle were thrown from the motorcycle. The male driver, 55, was not injured. The female passenger, 52, received minor injuries. Both were wearing helmets. All three people are from Maple Grove, MN.

At 1:15 p.m., U.S. Highway 16A, mile marker 33, 10 miles from Keystone: A motorcycle was southbound on U.S. Highway 16A when the driver failed to negotiate a curve. The motorcycle went off the roadway. The male driver, 53, from Walton, KY, sustained serious non-life threatening injuries. He was wearing a helmet.

At 4:30 p.m., Intersection of U.S. Highway 16 and South Dakota 244, three miles south of Hill City: A motorcycle was entering the intersection when the driver tried to avoid a vehicle turning left .The motorcycle went down on its side and both occupants were thrown. The male driver, 51, suffered minor injuries. The female passenger, 51, sustained serious non-life threatening injuries. Both occupants are from Rapid City. Neither were wearing a helmet.

At 10:30 p.m., Interstate 90, mile marker 26, three miles west of Whitewood: A motorcycle was westbound on Interstate 90 when it slowed down for deer in the roadway. A second motorcycle rear-ended the first. The two occupants on the first motorcycle, both from Cedar, MN, suffered minor injuries. The male driver, 42, was not wearing a helmet. The female passenger, 41, was wearing a helmet. The male driver of the second vehicle, 61, from Dickinson, ND, was not injured.